What does it mean to be a spectator to war in an era when the boundaries between witnessing and perpetrating violence have become profoundly blurred? Arguing that the contemporary dynamics of military spectatorship took shape in Napoleonic Europe, Watching War explores the status of warfare as a spectacle unfolding before a mass audience. By showing that the battlefield was a virtual phenomenon long before the invention of photography, film, or the Internet, this book proposes that the unique character of modern conflicts has been a product of imaginary as much as material forces.